“We need it for defence.” With these words, U.S. President Donald Trump sought to frame Greenland as a question of national security. The island’s vast reserves of critical minerals and its strategic position in the Arctic have long made it geopolitically significant, yet Trump’s rhetoric elevated it into a symbol of broader American ambitions. This move prompted a rare joint statement by the leaders of seven NATO member states, who rejected any attempt to annex Greenland, a semi-autonomous territory of Denmark. Coming alongside U.S. actions elsewhere, including the removal of Venezuela’s President Nicolás Maduro and threats of intervention in other regions, these developments have fuelled growing concern within NATO that Washington is advancing a new international order driven primarily by its own interests. The prospect of Greenland’s annexation therefore raises serious questions not only about the future of the alliance, but also reveals Europe’s weakened position in the international system and its limited capacity to resist American pressure.